The new Air is faster than its predecessor- and the MacBook Pro.
The MacBook Air has been benchmarked. MacWorld reports that processor performance has increased over the last generation of Air, despite a lower clocked processor speed. The 13" 1.86 GHz Air has twice the Speedmark 6.5 score, 108 over the 2009 model's 54. The Air's flash drive can duplicate a 1 GB file 13 seconds, compared to 69 seconds for the HDD model.
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The new nVidia GeForce 320M delivers three times the FPS of the 09's integrated graphics card. There is also a difference in performance between the 11" model and the 13" model. The larger Air is 27% faster and can handle displaying more FPS. The Air also outperforms the faster-on-paper Pro by 2 points in the Speedmark test.
Battery life was also tried. Looping a full-screen, full brightness movie the 11" air lasted 3 hours and 40 minutes. The 13" lasted 4 hours and 25 minutes. The last-gen Air, by comparison, got 3 hours and 5 minutes.